Sorry to hear of this, I hope they die with rats up their arses. And that's not funny it would be very painfull.

A friend of mine, his Mom had her car jacked at the lights a few years ago, knifepoint, very traumatizing, enough to near put you off driving if your a delicate type. I hope your sister is okay, if this were to happen to my nearest and dearest I would want blood, and lots of it.

Pardon my ignorance, but what is special about the car that they take it twice?